ICD-10 Code M00.13 – Pneumococcal arthritis, wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.13 – Pneumococcal arthritis, wrist
What it is
M00.13 identifies a pneumococcal infection of the wrist joint causing septic arthritis. Use it when Streptococcus pneumoniae is documented as the organism affecting the wrist.
Clinical signs
Typical findings include acute wrist pain, swelling, warmth, and limited range of motion. Clinical features vary; refer to documentation for confirmed joint infection and the identified organism.
When to use this code
Use M00.13 when the provider documents pneumococcal septic arthritis limited to the wrist. It is appropriate for confirmed infection of the wrist joint due to Streptococcus pneumoniae, including cases documented from aspiration, culture, or clear clinician diagnosis.
If the record names a different joint, a different organism, or only suspected infection, do not assign this code. Check documentation for laterality details only if your coding system requires them; this code itself specifies the wrist.
Do not use for
Do not use this code for noninfectious arthritis, cellulitis, or generalized pneumococcal infection without joint involvement. Do not code it when the wrist infection is caused by another organism.
Coding tip
Verify both the organism and the involved joint in the note before coding, and query if pneumococcal arthritis is not clearly documented.